ATC
Biological Process
CARD
CATH
Cellular Component
Disease Ontology
ECOD
Enzyme Classification
Genome Location
MeSH
Molecular Function
mpstruc
OPM
Protein Symmetry
SCOP-e
SCOP2
Source Organism
Source Organism Browser

The Source Organism browser is a hierarchical representation of all organisms in the NCBI Taxonomy database. Only organisms that are the source of naturally-occurring polymers (proteins and nucleic acids) whose structures are in the PDB are listed as active links in the browser. The PDB source organism assignment is based on author/UniProtKB specified mapping of polypeptides.

Here you can browse protein entities by source organism, and then search for the specific associated structures.

cellular organisms (131567) - [ 449,477 Polymer Entities ]
other entries (2787854) - [ 17,569 Polymer Entities ]
unclassified entries (2787823) - [ 835 Polymer Entities ]
Viruses (10239) - [ 29,686 Polymer Entities ]
Data from external resource.